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