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