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