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