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