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)(8,13,21,26,22,31,36,30)(17,28,20,34,33,32,35,29)(1,2)(3,4)(6,11,15,14)(12,27,16,25)(13,26,31,30)(28,34,32,29)(2,4)(5,7)(6,12)(8,20)(9,23)(10,19)(11,25)(13,29)(14,27)(15,16)(17,21)(18,24)(22,35)(26,32)(28,30)(31,34)(33,36) involution — undirected(5,8,9,21,10,22,24,36)(6,13,11,26,15,31,14,30)(7,17,18,20,19,33,23,35)(12,28,27,34,16,32,25,29)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.