One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,12)(5,9)(6,10)(8,14)(11,15)(13,16)(17,18,21,24)(19,22,25,28)(20,23,27,30)(26,29,31,32)(33,34,38,42)(35,43,46,39)(36,47,45,40)(37,41,44,48)(1,2)(3,7)(4,8)(5,9)(6,10)(11,13)(12,14)(15,16)(19,25)(22,28)(26,31)(29,32)(33,35,38,46)(34,39,42,43)(36,37,45,44)(40,41,47,48)(1,3)(2,5)(4,11)(6,9)(7,10)(8,15)(12,13)(14,16)(17,18)(19,22)(20,23)(21,24)(25,28)(26,29)(27,30)(31,32)(33,36,38,45)(34,40,42,47)(35,44,46,37)(39,48,43,41)(1,3)(2,7)(4,11)(5,10)(6,9)(8,13)(12,15)(14,16)(17,19)(18,22)(20,26)(21,25)(23,29)(24,28)(27,31)(30,32)(33,35)(34,39)(36,44)(37,45)(38,46)(40,48)(41,47)(42,43) involution — undirected(1,4)(2,8)(3,11)(5,15)(6,14)(7,13)(9,16)(10,12)(17,18)(19,22)(20,23)(21,24)(25,28)(26,29)(27,30)(31,32)(33,34)(35,39)(36,40)(37,41)(38,42)(43,46)(44,48)(45,47) involution — undirected(1,5,6,7)(2,9,10,3)(4,13,14,15)(8,11,12,16)(17,20,21,27)(18,23,24,30)(19,26,25,31)(22,29,28,32)(33,37,38,44)(34,41,42,48)(35,45,46,36)(39,47,43,40)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.