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