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