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