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