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