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