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