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