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