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