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