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