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