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