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