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)(23,28)(24,32)(25,29)(26,34)(27,30)(31,36)(33,35)(2,3)(5,7)(6,11)(8,16)(9,18)(10,17)(12,19)(13,20)(14,15)(21,23)(22,28)(24,33)(25,26)(27,31)(29,34)(30,36)(32,35) involution — undirected(1,2,4,3)(5,8,10,9)(6,12,14,13)(7,16,17,18)(11,19,15,20)(21,24,32,22,27,34,26,30)(23,29,35,36,31,33,25,28)(5,8,10,9)(6,13,14,12)(7,16,17,18)(11,20,15,19)(21,25,27,35)(22,29,30,33)(23,26,31,32)(24,28,34,36)(1,3,4,2)(5,9,10,8)(6,13,14,12)(7,16,17,18)(11,19,15,20)(23,31)(25,35)(28,36)(29,33)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.