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