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