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