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