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