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