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