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