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