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