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