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