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