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