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)(29,40)(30,39)(31,36)(32,42)(33,41)(34,38)(35,37)(43,48)(44,46)(45,47) involution — undirected(1,3,5,4)(2,6,7,8)(9,10)(11,15)(12,14)(13,16)(18,24)(19,29)(20,32)(21,22)(25,38)(26,41)(27,28)(30,44)(33,35)(36,40)(43,45)(46,47)(2,7)(6,8)(9,11,12,16)(10,13,14,15)(17,19)(18,25)(20,30)(21,34)(22,31)(23,29)(24,36)(26,39)(27,38)(28,40)(32,45)(33,43)(35,44)(37,46)(41,48)(42,47)(11,16)(13,15)(17,20,23,33)(18,26,28,41)(19,30,29,43)(21,32,22,35)(24,37,27,42)(25,39,40,48)(31,44,34,45)(36,46,38,47)(1,4,5,3)(2,8,7,6)(10,14)(13,15)(17,21,23,22)(18,24,28,27)(19,31,29,34)(20,32,33,35)(25,38,40,36)(26,37,41,42)(30,44,43,45)(39,47,48,46)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.