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