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