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