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