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