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)(17,18,23,28)(19,25,20,24)(21,22,27,26)(29,30,31,32)(36,44)(40,45)(42,48)(46,47)(2,8)(3,4)(10,15)(11,12)(17,19,23,20)(18,24,28,25)(21,31,27,29)(22,30,26,32)(33,34)(35,39)(36,45)(37,41)(38,43)(40,44)(42,46)(47,48)(1,3,7,4)(2,9,8,5)(6,11,14,12)(10,16,15,13)(17,19,23,20)(18,25,28,24)(21,29,27,31)(22,30,26,32)(33,35)(34,38)(36,42)(37,43)(39,41)(40,46)(44,48)(45,47)(1,4,7,3)(2,5,8,9)(6,12,14,11)(10,13,15,16)(17,20,23,19)(18,25,28,24)(21,31,27,29)(22,30,26,32)(33,35)(34,39)(36,42)(37,43)(38,41)(40,47)(44,48)(45,46)(1,5)(2,3)(4,8)(6,13)(7,9)(10,11)(12,15)(14,16)(17,21,23,27)(18,26,28,22)(19,29,20,31)(24,30,25,32)(33,36)(34,40)(35,42)(37,44)(38,46)(39,47)(41,45)(43,48)(1,6,7,14)(2,10,8,15)(3,11,4,12)(5,13,9,16)(17,22,23,26)(18,27,28,21)(19,30,20,32)(24,29,25,31)(33,34)(35,38)(36,40)(37,41)(39,43)(42,46)(44,45)(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.