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