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)(23,30)(24,25)(27,35)(29,34)(31,36)(32,33)(2,4)(5,7)(6,10)(8,14)(9,13)(11,18)(12,17)(15,20)(16,19)(21,22)(23,31)(24,34)(25,29)(26,28)(27,32)(30,36)(33,35) involution — undirected(7,13)(10,17)(14,19)(18,20)(21,23,25,30,26,32,24,33)(22,27,29,35,28,31,34,36)(7,13)(10,17)(14,19)(18,20)(22,28)(23,32)(29,34)(30,33) involution — undirected(5,8,9,16)(6,11,12,15)(7,14,13,19)(10,18,17,20)(21,24,26,25)(22,29,28,34)(23,33,32,30)(27,35,31,36)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.