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