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