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