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