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