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