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