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