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