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