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