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