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