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