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