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