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