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