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