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