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