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