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