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