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