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