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