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