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