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