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