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