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