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