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