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