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