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