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