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