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