One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,6)(5,8)(9,10,12,14)(11,13,15,16)(17,18,22,25)(19,29,20,33)(21,37,39,43)(23,40,38,28)(24,35,26,31)(27,34,42,30)(32,48,36,45)(41,46,44,47)(1,3,4,8)(2,5,6,7)(9,11)(10,13)(12,15)(14,16)(17,19,30,46,23,32,39,35,22,20,34,47,38,36,21,31)(18,24,37,45,28,41,42,33,25,26,43,48,40,44,27,29)(2,6)(5,7)(11,15)(13,16)(18,25)(24,26)(27,42)(28,40)(29,33)(37,43)(41,44)(45,48) involution — undirected(2,6)(5,7)(17,20,34,46,23,36,21,35,22,19,30,47,38,32,39,31)(18,26,43,45,28,44,27,33,25,24,37,48,40,41,42,29)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.