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