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