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