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