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