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)(25,35)(30,44)(31,40)(33,39)(36,41)(37,42)(38,47)(43,46)(45,48) involution — undirected(1,2,4,6,5,8,12,14)(3,9,11,16,10,7,15,13)(17,19,21,32,23,33,22,31)(18,24,27,29,28,40,26,39)(20,30,35,46,36,47,37,45)(25,38,34,43,42,44,41,48)(17,20)(18,25)(19,30)(21,35)(22,37)(23,36)(24,38)(26,41)(27,34)(28,42)(29,43)(31,45)(32,46)(33,47)(39,48)(40,44) involution — undirected(1,3)(2,7)(4,11)(5,10)(6,13)(8,9)(12,15)(14,16)(17,21,23,22)(18,26,28,27)(19,31,33,32)(20,35,36,37)(24,29,40,39)(25,41,42,34)(30,45,47,46)(38,43,44,48)(3,10)(7,9)(11,15)(13,16)(17,21,23,22)(18,26,28,27)(19,32,33,31)(20,35,36,37)(24,39,40,29)(25,41,42,34)(30,46,47,45)(38,48,44,43)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.