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