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