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