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