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