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