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