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