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