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