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