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