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