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