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