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