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)(11,13)(12,15)(14,16)(17,18,21,22)(19,23,27,25)(20,28,29,24)(26,31,32,30)(33,34,39,36)(35,42,37,40)(38,44,46,41)(43,47,45,48)(2,7)(3,10)(4,12)(13,14)(17,18)(19,25)(20,24)(21,22)(23,27)(26,31)(28,29)(30,32)(33,35,39,37)(34,40,36,42)(38,43,46,45)(41,47,44,48)(18,22)(23,25)(24,28)(30,31)(34,36)(40,42)(41,44)(47,48) involution — undirected(1,3,6,10)(2,8,7,5)(4,11,12,16)(9,13,15,14)(17,18)(19,23)(20,24)(21,22)(25,27)(26,30)(28,29)(31,32)(33,36,39,34)(35,40,37,42)(38,44,46,41)(43,47,45,48)(1,4,6,12)(2,9,7,15)(3,11,10,16)(5,14,8,13)(17,19,21,27)(18,23,22,25)(20,26,29,32)(24,30,28,31)(33,37,39,35)(34,40,36,42)(38,43,46,45)(41,48,44,47)(1,5,6,8)(2,10,7,3)(4,13,12,14)(9,11,15,16)(17,20,21,29)(18,24,22,28)(19,26,27,32)(23,30,25,31)(33,38,39,46)(34,41,36,44)(35,43,37,45)(40,47,42,48)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.