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