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