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