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