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