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