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