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