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