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