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