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