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