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