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