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