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