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