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