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