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