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