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)(33,34,38,36)(35,41,43,39)(37,40,46,44)(42,48,45,47)(1,2)(3,7)(4,8)(5,9)(6,10)(11,13)(12,14)(15,16)(19,25)(22,28)(26,31)(29,32)(33,35,38,43)(34,39,36,41)(37,42,46,45)(40,47,44,48)(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)(33,34,38,36)(35,39,43,41)(37,40,46,44)(42,47,45,48)(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)(36,41)(37,45)(38,43)(40,48)(42,46)(44,47) 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)(33,36,38,34)(35,41,43,39)(37,40,46,44)(42,47,45,48)(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)(34,40)(35,42)(36,44)(38,46)(39,47)(41,48)(43,45)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.