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