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