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