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