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