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