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