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