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