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