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