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