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