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