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