One vertex per element, one color per generator, with an edge from x to x·s.
(4,12)(7,14)(10,16)(13,15)(18,22)(23,28)(24,29)(30,32)(33,34,38,41)(35,42,39,36)(37,45,46,40)(43,44,47,48)(1,2)(3,6)(4,7)(5,8)(9,11)(10,13)(12,14)(15,16)(19,25)(23,28)(26,31)(30,32)(33,34)(35,36)(37,40)(38,41)(39,42)(43,44)(45,46)(47,48) involution — undirected(1,2,5,8)(3,6,11,9)(4,7,12,14)(10,13,16,15)(17,18)(19,23)(20,24)(21,22)(25,28)(26,30)(27,29)(31,32)(33,35,38,39)(34,36,41,42)(37,43,46,47)(40,44,45,48)(1,2)(3,9)(4,7)(5,8)(6,11)(10,15)(12,14)(13,16)(17,19)(18,23)(20,26)(21,25)(22,28)(24,30)(27,31)(29,32)(33,36,38,42)(34,39,41,35)(37,44,46,48)(40,47,45,43)(1,3)(2,6)(4,10)(5,11)(7,13)(8,9)(12,16)(14,15)(17,18)(19,23)(20,24)(21,22)(25,28)(26,30)(27,29)(31,32)(33,34)(35,36)(37,40)(38,41)(39,42)(43,44)(45,46)(47,48) involution — undirected(1,4)(2,7)(3,10)(5,12)(6,13)(8,14)(9,15)(11,16)(17,20,21,27)(18,24,22,29)(19,26,25,31)(23,30,28,32)(33,37,38,46)(34,40,41,45)(35,43,39,47)(36,44,42,48)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.