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