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