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