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)(13,14,18,17)(15,16,20,19)(21,22,25,28)(23,26,27,24)(6,7)(8,12)(13,15,18,20)(14,19,17,16)(21,22)(23,24)(25,28)(26,27)(8,12)(10,11)(13,16)(14,15)(17,20)(18,19)(21,22,25,28)(23,26,27,24)(1,2)(3,4)(5,7,9,6)(8,10,12,11)(13,16)(14,15)(17,20)(18,19)(21,23)(22,26)(24,28)(25,27)(5,8,9,12)(6,10,7,11)(13,17,18,14)(15,19,20,16)(21,24,25,26)(22,27,28,23)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.