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