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